| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | German Democratic Republic | 2 | |
| #3 | Australia | 1 | |
| #4 | Belgium | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Finland | 1 | |
| #7 | France | 1 | |
| #8 | Italy | 1 | |
| #9 | Japan | 1 | |
| #10 | Netherlands | 1 | |
| #11 | Norway | 1 | |
| #12 | Poland | 1 | |
| #13 | Portugal | 1 | |
| #14 | Sweden | 1 | |
| #15 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #16 | Turkey | 1 | |
| #17 | United States | 1 | |
| #18 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Machines for making railways | |
| #2 | Unspecified technologies | |
| #3 | Platform constructions | |
| #4 | Construction of roads | |
| #5 | Rail vehicle suspensions | |
| #6 | Vehicle wheels |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frenzel Juergen | 11 |
| #2 | Kaulbersch Otto | 1 |
| #3 | Frentsel Yurgen | 1 |
| #4 | Glasner Gerd | 1 |
| #5 | Yurugen Furenzeru | 1 |
| #6 | Wirthwein Udo | 1 |
| #7 | Frenzel Tim | 1 |
| #8 | Frenzel Jurgen | 1 |
| #9 | Frenzel J | 1 |
| #10 | Zingelmann Jochen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2011070151A1 | Sound absorption coating on oscillating surfaces, in particular for railway vehicles and railroad tracks, and method for applying the sound absorption coating onto a surface that can be caused to oscillate | |
| DE4009479A1 | DEVICE SYSTEM FOR COVERING TRACKS | |
| DD141700A1 | Method and arrangement for detecting the opening time of injection needle valves | |
| SU727156A3 | Sleeper | |
| PT67525A | Railway threshold | |
| DE2751531A1 | Steel or concrete railway sleeper - has Y=shape with limbs welded together and having U-shaped section |